–：HTML 区域标题元素

屏幕阅读软件用户的另一种常用导航技术是生成内容分区的列表，并使用其确定页面布局

Sectioning content can be labeled using a combination of the aria-labelledby and id attributes, with the label concisely describing the purpose of the section. This technique is useful for situations where there is more than one sectioning element on the same page.

In this example, screen reading technology would announce that there are two sections, one called "Primary navigation" and one called "Footer navigation". If labels were not provided, the person using screen reading software may have to investigate each nav element's contents to determine their purpose.